I was working on perfecting my shirt pattern a few months ago. Made about nine size 38 patterns and muslins, but I had to take a break from it and work on other things. Finally had time to make a finished version for myself a few weekends ago.
The details are loosely based on military shirts from World War I. So think 1918-1920, but with a fully buttoned front, instead of the more period correct, pull-over, placket front.
As typical, some design elements worked and others didn't. And the wool was a pain to work with, but the fit is great. It's the most comfortable shirt I've ever made for myself, so I'm pretty happy with that.
Hand-felled seams, single needle everything. Wool fabric from a vintage shop.